NDLI: Novel Nano-Filled Coatings for the Protection of Built Heritage Stone Surfaces

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Novel Nano-Filled Coatings for the Protection of Built Heritage Stone Surfaces

Content Provider	MDPI
Author	Lettieri, Mariateresa Masieri, Maurizio Frigione, Mariaenrica
Copyright Year	2021
Description	An experimental nano-filled coating, based on a fluorine resin containing SiO2 nano-particles, was applied on calcareous stones, representative of materials used in buildings and monuments of the Mediterranean basin; for comparison purposes, two commercial products were applied on the same substrates. The efficacy of the protective treatments was assessed by analyzing different characteristics of the three experimental/commercial products, i.e., color changes and permeability to water vapor to evaluate the treatments’ harmlessness; capillary water absorption and water stone contact angle to evaluate the protection against water ingress; oleophobicity of the treated surfaces and the behavior under staining by acrylic blue-colored spray paint and felt-tip marker to verify the anti-graffiti action. Finally, the properties of the treated stone surfaces were analyzed also after the application of pancreatin, used to simulate bird excreta (guano). The protective coatings were found to promote graffiti removal, reducing also the detrimental effects due to simulated guano. The experimental nano-filled product, in addition, was able to provide outstanding performance but using smaller amounts of product in comparison to commercial systems.
Starting Page	301
e-ISSN	20794991
DOI	10.3390/nano11020301
Journal	Nanomaterials
Issue Number	2
Volume Number	11
Language	English
Publisher	MDPI
Publisher Date	2021-01-25
Access Restriction	Open
Subject Keyword	Nanomaterials Coatings and Films Stone Protection Nano-filled Polymeric Coatings Hydrophobic Treatments Oleophobicity Anti-graffiti Coatings Acrylic-based Paints Guano Simulation
Content Type	Text
Resource Type	Article

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